KDF Lab Test Results from
Biological Research Solutions
Laboratory Service Performed: Analysis of the mode of action of KDF versus Pseudomonas fluorescens.
Table 1- Testing Protocol
Sample
# |
Bacterial
Injector |
KDF
Column |
Description of Purpose |
| 1 |
Off |
Off |
Control: |
Measure survival of Ps. fluorescens in water that has passed through the system KDF off by inoculating after collection. |
| 2 |
Off |
On |
KDF
Elution: |
Measure survival in water that has passed through KDF by inoculating after collection. |
| 3 |
On |
Off |
Control: |
Measure survival of Ps. fluorescens that have been injected into the system with KDF off. |
| 4 |
On |
On |
KDF
Contact: |
Measure survival of Ps. fluorescens that have come in direct contact with KDF. |
All water used for testing was deionized and injected with AOAC synthetic hard water to a final concentration of 100 ppm and a pH 7.0 +/-.2
Following collection, the samples were surface plated on Plate Count Agar within 2 to 3 minutes of collection and again after incubation at room temperature for 3 hours.
The same inoculums of Pseudomonas fluorescens was used for injection in to Samples 3 and 4 or for addition to Samples 1 and 2 (added after collection of the water).
Table 2 - KDF Testing Results.
Experiment #
(Date) |
Sample #* |
Time
0 |
Time
3 hours |
| I: 7-18-90 |
1 |
900 |
740 |
| |
2 |
810 |
650 |
| |
3 |
440 |
570 |
| |
4 |
4 |
0 |
| II: 7-19-00 |
1 |
1800 |
1600 |
| |
2 |
1800 |
30 |
| |
3 |
2100 |
1900 |
| |
4 |
350 |
33 |
| III: 7-21-90 |
1 |
580 |
460 |
| |
2 |
580 |
31 |
| |
3 |
650 |
330 |
| |
4 |
390 |
0 |
| IV: 7-23-90 |
1 |
740 |
630 |
| |
2 |
740 |
180 |
| |
3 |
770 |
470 |
| |
4 |
360 |
42 |
| Average: |
1 |
1000 |
830 |
| |
2 |
30 |
220 |
| |
3 |
990 |
820 |
| |
4 |
280 |
19 |
* Sample numbers are described in Table 1.
Table 3 - Chlorine removal by KDF.
Pump Rate
Pulse per Minute |
Calculated ppm
Free Chlorine |
Measured
ppm
(KDF Off) |
Measured
ppm
KDF (On) |
| 10 |
1.8 |
1.6 |
Less than .1 |
| 40 |
7.4 |
6.0 |
0.5 |
| 80 |
14.0 |
14.0 |
1.5 |
| 120 |
21.0 |
20.0 |
2.5 |
Figure 1: KDF Model Water Test System
